Photopolymerization

Video credit: isodo3d

This is the original 3D printing process. Developed by 3D Systems and marketed in the late 1980s, it uses an ultraviolet laser beam to turn designated zones of liquid polymer in a vat into solids. The main advantages of this technique are speed and the ability to make large parts. There are some drawbacks, however: the parts require supports; parts can be fragile; and most significantly, no material other than photopolymers can be used.

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